Finding the Fourth Proportional to 67.79, 101.54 and 40.72

Step by Step Solution

1. Step 1: Write the proportion equation
   67.79 : 101.54 = 40.72 : x
2. Step 2: Convert to fraction form
   67.79/101.54 = 40.72/x
3. Step 3: Cross multiply
   67.79x = 101.54 × 40.72
4. Step 4: Simplify right side
   67.79x = 4,134.71
5. Step 5: Solve for x
   x = 4,134.71/67.79
6. Step 6: Final answer
   x = 60.99